A NSW South Coast beach is likely to remain closed Wednesday afternoon after a massive shark attacked and killed a juvenile whale. The whale was spotted earlier in the day, washed onto rocks at South Broulee beach. A rescue mission was being organised when the whale washed back off the rocks. "Twenty minutes later a massive shark came in and just took half of it," Far South Coast director of surf lifesaving Andrew Edmunds said. "The beach is now closed and is likely to remain so for the rest of the afternoon. We are advising people to be cautious and stay away from the water." More than 200 people were on the rocks at the time. "They have been moved on and police are trying to keep people away from the area."